Abstract
Abstract In Mediterranean-type climates, terminal drought induces grain yield losses in wheat. Antitranspirants can reduce the impacts of terminal drought and improve yield, but the mechanisms involved are not fully understood. Among other impacts, drought elevates endogenous abscisic acid (ABA) concentration. Here, the effectiveness of a film antitranspirant (di-1- p -menthene) was studied in relation to plant water status and spike ABA. The objective was to determine whether drought amelioration with di-1- p -menthene was solely mediated through a reduction in ABA by comparing its effects to that of fluridone (an ABA inhibitor). The treatments were assessed in a randomized complete block design in two field experiments in spring and summer of 2020, with six and eight replicate blocks, respectively, at Harper Adams University, UK, to compare their effects on spike ABA, gas exchange and agronomic traits under progressive drought conditions. Di-1- p -menthene was applied at 1 l/ha; and fluridone at 10, 20 and 50 μM concentrations, at flag leaf emergence, growth stage 37 (GS37). Drought increased spike ABA and downregulated photosynthesis. Di-1- p -menthene and fluridone at some concentrations, reduced spike ABA and photosynthesis. Di-1- p -menthene suppressed transpiration and spike ABA, each by 21% but increased grain yield by 27%. In contrast, although fluridone (at 10 and 50 μM) also reduced spike ABA (by 16%), overall, it did not alter transpiration or grain yield. The results suggest that yield improvement with di-1- p -methene is mediated through mechanisms that involve conservation of plant water linked to reduced transpiration, with inhibition of spike ABA playing a secondary role.
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Claims 13
Claim · model-written summary
Drought increased spike ABA.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Droughte0
- Outcome
- spike ABAe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought increased spike ABA and downregulated photosynthesis.”
t0“wheat”
Claim · model-written summary
Drought downregulated photosynthesis.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Droughte0
- Outcome
- photosynthesise0
- Direction
- downregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought increased spike ABA and downregulated photosynthesis.”
t0“wheat”
Claim · model-written summary
Di-1- p -menthene reduced spike ABA.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Di-1- p -menthenee0
- Outcome
- spike ABAe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Di-1- p -menthene and fluridone at some concentrations, reduced spike ABA and photosynthesis.”
t0“wheat”
Claim · model-written summary
Fluridone at some concentrations reduced spike ABA.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- fluridone at some concentrationse0
- Outcome
- spike ABAe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Di-1- p -menthene and fluridone at some concentrations, reduced spike ABA and photosynthesis.”
t0“wheat”
Claim · model-written summary
Di-1- p -menthene reduced photosynthesis.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Di-1- p -menthenee0
- Outcome
- photosynthesise0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Di-1- p -menthene and fluridone at some concentrations, reduced spike ABA and photosynthesis.”
t0“wheat”
Claim · model-written summary
Fluridone at some concentrations reduced photosynthesis.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- fluridone at some concentrationse0
- Outcome
- photosynthesise0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Di-1- p -menthene and fluridone at some concentrations, reduced spike ABA and photosynthesis.”
t0“wheat”
Claim · model-written summary
Di-1- p -menthene suppressed transpiration by 21%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Di-1- p -menthenee0
- Outcome
- transpiratione0
- Direction
- suppressede0
- Value
- 21%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Di-1- p -menthene suppressed transpiration and spike ABA, each by 21% but increased grain yield by 27%.”
t0“wheat”
Claim · model-written summary
Di-1- p -menthene suppressed spike ABA by 21%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Di-1- p -menthenee0
- Outcome
- spike ABAe0
- Direction
- suppressede0
- Value
- 21%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Di-1- p -menthene suppressed transpiration and spike ABA, each by 21% but increased grain yield by 27%.”
t0“wheat”
Claim · model-written summary
Di-1- p -menthene increased grain yield by 27%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Di-1- p -menthenee0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 27%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Di-1- p -menthene suppressed transpiration and spike ABA, each by 21% but increased grain yield by 27%.”
t0“wheat”
Claim · model-written summary
Fluridone at 10 and 50 μM reduced spike ABA by 16%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- fluridone (at 10 and 50 μM)e0
- Outcome
- spike ABAe0
- Direction
- reducede0
- Value
- 16%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fluridone (at 10 and 50 μM) also reduced spike ABA (by 16%)”
t0“wheat”
Claim · model-written summary
Fluridone overall did not alter transpiration.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- fluridone (at 10 and 50 μM)e0
- Outcome
- transpiratione0
- Direction
- did not altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fluridone (at 10 and 50 μM) also reduced spike ABA (by 16%), overall, it did not alter transpiration or grain yield.”
t0“wheat”
Claim · model-written summary
Fluridone overall did not alter grain yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- fluridone (at 10 and 50 μM)e0
- Outcome
- grain yielde0
- Direction
- did not altere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fluridone (at 10 and 50 μM) also reduced spike ABA (by 16%), overall, it did not alter transpiration or grain yield.”
t0“wheat”
Claim · model-written summary
Authors infer yield improvement chiefly involves water conservation through reduced transpiration.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- di-1- p -methenee0
- Outcome
- yield improvemente0
- Qualifier
- conservation of plant water linked to reduced transpiratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield improvement with di-1- p -methene is mediated through mechanisms that involve conservation of plant water linked to reduced transpiration, with inhibition of spike ABA playing a secondary role.”
t0“wheat”
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See all 632 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.